Sprockets on spider: 7 sprockets on 2 spider carriers. Sprocket material: hi-tensile steel (1st-10th) and A7075 (11th-12th). Alloy spiders, lockring & spacers. Bike Cassette SunRace CSMZ90 12 Speed 11-50T Black.Thank you for visiting our product. We usually dispatch all orders the same day, if ordered before our cut-off time. However some items are located at non-dispatch warehouse locations which means an extra day or two before we dispatch the order. If you wish to return an item after receiving your order you have 30 days to return your item. We will endeavour to turn an unhappy experience into a positive one. SDJ Sports was founded in 2012 by Steve Gill, Dominic Coates and Joe McNeice - three sports retail business professionals and keen sports enthusiasts who shared a common vision - to offer quality sports brands at all price points to worldwide customers and to fully utilise their combined years of experience and supplier relationships in the sports retail sector. We are commited to provide you with the very best online shopping experience. Our store features many products spanning a large range of sports. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Cassettes, Freewheels & Cogs". The seller is "sdj-sports" and is located in this country: GB. This item can be shipped to United States, Canada.